Bio-energy in the Black

Common renewable energy strategies can at best off-set fossil fuel emissions of carbon dioxide, but are not able to reverse climate change. One promising approach of lowering carbon dioxide in the atmosphere while producing energy is bio-char bio-energy based on low-temperature pyrolysis. This bio-energy technology relies on capturing the off-gases from thermal decomposition of wood or grasses to produce heat, electricity or bio-fuels. Bio-char is a significant by-product of this pyrolysis with remarkable environmental properties. Bio-char in soil was shown to persist longer and to retain cations better than other forms of soil organic matter. [via]

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